package com.qk.interceptor;

import com.qk.utils.CurrentUserHoler;
import com.qk.utils.JwtUtils;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

@Slf4j
@Component
public class TokenInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //1.获取请求路径
        String uri = request.getRequestURI();
        //2.判断请求路径是否为登录路径
        if(uri.contains("/login")){
            return  true;
        }

        //3.判断token是否存在
        String jwt = request.getHeader("token");
        if(jwt == null || jwt.equals("")){
            log.info("请求头token不存在");
            response.setStatus(401);
            return  false;
        }
        //4.如果token不存在，返回未授权
        try {
            Claims claims = JwtUtils.parseToken(jwt);
            Integer userId = claims.get("id", Integer.class);
            log.info("当前用户ID，存入ThreadLocal");
            CurrentUserHoler.setCurrentUser(userId);
        } catch (Exception e){
            log.info("令牌解析失败");
            response.setStatus(401);
            return  false;
        }
        log.info("令牌解析成功");
        //5.放行
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        log.info("删除ThreadLocal中的登录信息");
        CurrentUserHoler.removeCurrentUser();
    }
}
